Re: wxAuiNotebook, changing the close button bitmap?

Thank you for this. I tried something similar, but only had code 
for DrawButton which never got called.

All the best,

Tony.

On Wednesday, 22 November 2023 at 18:59:40 UTC PB wrote:

> Hi,
>
> *Disclaimer: I know little about wxAUI, just took a look at the sources, 
> and I am Windows only.*
>
> Replacing close button bitmaps in wxAuiSimpleTabArt is very simple but 
> more complicated with wxAuiDefaultTabArt. wxAuiDefaultTabArt differs 
> between platforms 
> <https://github.com/wxWidgets/wxWidgets/blob/14f6f82e46641ef226b23143c1f44570c769176b/include/wx/aui/tabart.h#L320>, 
> e.g., it actually is wxAuiMSWTabArt on Windows which uses native theme API 
> to draw the button.
>
> Anyway, I tried if using a custom art for the tab works, writing a 
> proof-of-concept code using a help bitmap as the close button (same for 
> active and disabled), borrowing the draw methods from the generic tab art 
> when needed, not caring about how it looks:
> [image: wx-auintb-art.png]
>
> #include <wx/wx.h>
> #include <wx/artprov.h>
> #include <wx/aui/auibook.h>
>
> class MyAuiSimpleTabArt : public wxAuiSimpleTabArt
> {
> public:
>     MyAuiSimpleTabArt(const wxBitmapBundle& activeCloseBmp, const 
> wxBitmapBundle& disabledCloseBmp)
>     {
>         m_activeCloseBmp = activeCloseBmp;
>         m_disabledCloseBmp = disabledCloseBmp;
>     }
>
>     wxAuiTabArt* Clone()
>     {
>         return new MyAuiSimpleTabArt(*this);
>     }
> };
>
> class MyAuiDefaultTabArt : public wxAuiDefaultTabArt
> {
> public:
>     MyAuiDefaultTabArt(const wxBitmapBundle& activeCloseBmp, const 
> wxBitmapBundle& disabledCloseBmp)
>     {
>         m_activeCloseBmp = activeCloseBmp;
>         m_disabledCloseBmp = disabledCloseBmp;
>     }
>
>     // This draws the "Close active tab" button on the far right
>     void DrawButton(wxDC& dc, wxWindow* wnd, const wxRect& in_rect, int 
> bitmap_id, int button_state, int orientation, wxRect* out_rect) override
>     {
>         // for testing, use generic version
>         wxAuiGenericTabArt::DrawButton(dc, wnd, in_rect, bitmap_id, 
> button_state, orientation, out_rect);
>     }
>
>     void DrawTab(wxDC& dc, wxWindow* wnd, const wxAuiNotebookPage& page, 
> const wxRect& in_rect, int close_button_state, wxRect* out_tab_rect, 
> wxRect* out_button_rect, int* x_extent) override
>     {
>         // for testing, use generic version
>         wxAuiGenericTabArt::DrawTab(dc, wnd, page, in_rect, 
> close_button_state, out_tab_rect, out_button_rect, x_extent);
>     }
>
>     wxAuiTabArt* Clone()
>     {
>         return new MyAuiDefaultTabArt(*this);
>     }
> };
>
> class MyFrame : public wxFrame
> {
> public:
>     MyFrame(wxWindow* parent = nullptr) : wxFrame(parent, wxID_ANY, "Test")
>     {
>         const wxBitmapBundle activeClose = 
> wxArtProvider::GetBitmapBundle(wxART_HELP, wxART_OTHER, wxSize(16,16));
>         const wxBitmapBundle disabledClose = activeClose;
>
>         wxBoxSizer* mainSizer = new wxBoxSizer(wxVERTICAL);
>
>         mainSizer->Add(AddNotebook(new MyAuiSimpleTabArt(activeClose, 
> disabledClose)), wxSizerFlags(1).Expand());
>         mainSizer->Add(AddNotebook(new MyAuiDefaultTabArt(activeClose, 
> disabledClose)), wxSizerFlags(1).Expand());
>         SetSizer(mainSizer);
>     }
> private:
>     wxAuiNotebook* AddNotebook(wxAuiTabArt* tabArt)
>     {
>         wxAuiNotebook* notebook = new wxAuiNotebook(this, wxID_ANY, 
> wxDefaultPosition, wxDefaultSize, wxAUI_NB_CLOSE_BUTTON | 
> wxAUI_NB_CLOSE_ON_ALL_TABS | wxAUI_NB_DEFAULT_STYLE);
>
>         notebook->SetArtProvider(tabArt);
>         for ( size_t i = 0; i < 10; ++i )
>             notebook->AddPage(new wxPanel(notebook), 
> wxString::Format("Page %zu", i), false);
>         return notebook;
>     }
> };
>
> class MyApp : public wxApp
> {
>     bool OnInit() override
>     {
>         (new MyFrame())->Show();
>         return true;
>     }
> }; wxIMPLEMENT_APP(MyApp);
>
> To conclude, customizing the tab art seems possible but may require some 
> effort to look good and work properly on all the platforms.
>
> Regards,
> PB
>

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